MAINTENANCE PLAN
152
4.7.1.f CHECKING THE SHOE FASTENING
DANGER
• To make up for the inevitable settling movements, it is absolutely necessary to check the driving torque
of the screws (1) after the first 30 hours of operation.
A successive check must be carried out after the first 100 hours of running-in and repeated after 200
hours of operation if a considerable decrease in the screw fastening is observed.
• If the screws (1) loosen and the driving torque is not corrected, the duration of the tracks will certainly
be shorter.
• After tightening the screws, make sure that nut and shoe are in contact with the surface of the link.
RWA19800
4
1
3
2
The check must be carried out with the machine at rest on level
ground.
Tightening method
Tighten the screws with an initial driving torque of 20±2 kgm,
making sure that nut and shoe are in contact with the link surface.
Successively give a further turn of 120°±10°.
Use a 24 mm spanner.
Tightening sequence
The screw tightening sequence for each element must respect
the order 1-2-3-4 indicated in the figure.
RWAA1570
1
1
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